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e. NILSON.

WRENCH. APPLICATION FILijD III. 24. "I9. 1,306,02Q. Patenmd June 10, 1919.

ATTORNEY GUSTAF E. NILSON, OF NEW YORIS, N. Y.

WRENCH.

Specification of Letters Patenti Patented Ju 11c 10, 1 919.

Application filled February 24, 1919. Serial No. 278,754.

To all whom it may concern:

Be it. known that. I, GITH'IAF E. Nilsox, a citizen of Finland, residing at New York city, county and State of New York, have invented certain new and useful Improvemeats in Wrenches, of which the following is a full, clear, and exact description.

This invention relates to improvements in wrenches, the object being. mainly, to providea wrench, of the. monkey or movable. jaw variety. that. can be manipulated to adjust the jaws to various sizes of nuts by one. hand. that is to say. adjusted by the hand which holds the wrench. The usual form of movable jaw wrench requires the use of both hands when the jaws are to be adjusted. The jaws of my improved wrench can be adjusted and held by the same hand. The nnmner of carrying out the above mentioned feature, as well as other features of improvement, will be set forth in the following s wcilication, reference. being had to the accompanying drawing. wherein l lgure l is a side elevation of an embodiment of my invention;

Fig. 2 is an enlarged edge view. looking from the loft in Fig. 1;

Fig. 3 is an enlarged sectional view, the section being taken on a line 3-3 in Fig. 2;

Fig. 4 is an end view of the handle portion of the wrench;

Fig. 6 is an cnla-r ed detail side view of the nut to operate tie movable j'aw adjusting spindle; and

Fig. 6 is an end view of the head of the wrench.

My improved wrench comprises a handle 7 having a head 8 consisting of a. fixed jawmembcr 9 and a movable or adjustable ]awmember 10 carried by a bar 11 having rack teeth 12. The bar 11 carries (in this instance) two tides 13 slidably engaging grooves or raibcts 14 in the body portion 15 of thehead 8, which is slotted to form a channel ,16" to receive bar 11 which carries the jaws 10. The teeth 12 of the bar 11 mesh with a worm, 16 rotatably su ported within the channel 16' by blocks 17 and18. The block 17 enga s a projection 19 on the worm 16 and the b ock 18 a projection 20. "The projection or spindle 20 is pivotally connected to a block 21 which in turn is enaged by the jaw 22 of a threaded spindle 8 rotatubly mounted in a channel 24 formed in the handle 3. The outer end of the handle carries a block 25 to rotate-lily support the adjacent end of the spindle 23.

The function of the worm 16 is to adjust jaw-member 10 or move it toward or a ay from jaw-member 9. The function of the spindle 23. which carries a thread in the form of a helical groove 26. is to rotate the worm 16 to which it. is connected. The connection between the adjacent ends .of the spindle. 23 and worm 16 is universal, in or der that the worm can be rotated by means of the angularly'disposcd spindle 23.

To rotate the spindle 23, I provide a slidable nut 27 carrying a. web 28 to engage the helical groove in spindle 23. As can be seen in Fig. 4, the nut. 27 carries guide members 29 and 30 through which spindle 23 passes, the. web 28 being located between said guide members. The guide members '29 and 30 engage the channel 24 in the handle 7, the channel 24 and guide members 29 and 30 being in this instance cylindrical in cross section or at least approximately so. The nut. or block 27. is, during its movement longitudinally of the handle 7, guided by the channel 24. During the longitudinal movement of the nut or block 27, the-spindle 23 will be rotated, by the inter-meshing web 28, and will in turn rotate worm 16, which rotation will cause the bar 11. and jaw 10 to move toward or away from jaw 9.

The block or nut 27 can be operated, or moved longitudinally of t-he'handle. 7, by the thumb of the hand which snpports or holds the wrench, or the wrench can be held in such manner as to' permit it to slip, by gravity, through the hand. when held in a. vertical position, as indicated in Fig. 1. ln any event, it is but necessary to move the block or nut 27 longitudinally of the handle 7 to cause spindle 23 to rotate, whereby jaw 10 will be moved toward or away from jaw 9. Both the blocks 17 and 25 are held in place by pins or screws, indicated by 31 and 32. By removing the. pins or screws, the blocks can be removed and the spindle 23 and worm 16 taken out; the movable jaw 10 and its bar 11 can also be taken out. Block 18 is a permanent element.

I do not limit myself to the preciseconstruction herein illustrated, as some may be changed in various details and still be with in the scope of my invention. 

